add logger

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

driver.go

@@ -1,7 +1,9 @@
 package wrapper
 
 import (
+	"context"
 	"database/sql/driver"
+	"time"
 )
 
 // wrapperDriver defines a wrapper for driver.Driver
@@ -17,9 +19,17 @@ func NewWrapper(d driver.Driver, opts ...Option) driver.Driver {
 
 // Open implements driver.Driver Open
 func (w *wrapperDriver) Open(name string) (driver.Conn, error) {
+	ts := time.Now()
 	c, err := w.driver.Open(name)
+	td := time.Since(ts)
+
+	if w.opts.LoggerEnabled {
+		w.opts.Logger.Fields(w.opts.LoggerObserver(context.TODO(), "Open", labelUnknown, td, err)...).Log(context.TODO(), w.opts.LoggerLevel)
+	}
+
 	if err != nil {
 		return nil, err
 	}
+
 	return &wrapperConn{conn: c, opts: w.opts}, nil
 }